Here's a space-age idea if you've ever heard one: NASA is building a galactic GPS system that will provide astronauts a better, more accurate map through our solar system. This is obviously an ambitious undertaking, one that will take generations, not years, to complete. »6/06/13 11:09am 6/06/13 11:09am

While your computer is running idle, it could be finding new pulsars and black holes in deep space—just like the computers of three volunteers running a program called Einstein@Home.»8/12/10 8:20pm 8/12/10 8:20pm

OK, mind blowing: A scientist at the Observatoire de Paris basically invented GPS for interstellar travelers: Simply tune in the radio signals from four pulsars, crunch some numbers having to do with relativity (natch) and read your position within the galaxy—to within a meter. »5/27/09 11:00pm 5/27/09 11:00pm